<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //声明和赋值
        let age=18;
        //输出赋值
        console.log(age);
        //重新赋值
        // let age =10      不能重复命名
        age=19
        console.log(age);

        //声明多个变量,英文逗号隔开
        let Sname="张三"
        let Aname="李四"
        console.log(Sname,Aname);
    </script>
</body>
</html>